problems remain, try unparallel

libreoffice.spec

@@ -725,6 +725,9 @@ if [ $SMP_MFLAGS -lt 2 ]; then SMP_MFLAGS=2; fi
 NDMAKES=`dc -e "$SMP_MFLAGS v p"`
 NBUILDS=`dc -e "$SMP_MFLAGS $NDMAKES / p"`
 
+NDMAKES=1
+NBUILDS=1
+
 autoconf
 %configure \
  --with-vendor="Red Hat, Inc." --with-num-cpus=$NBUILDS --with-max-jobs=$NDMAKES \